-1
-----------------
______________
/ 2
\/ 1 - (a - x)
$$- \frac{1}{\sqrt{- \left(a - x\right)^{2} + 1}}$$
a - x
-----------------
3/2
/ 2\
\1 - (a - x) /
$$\frac{a - x}{\left(- \left(a - x\right)^{2} + 1\right)^{\frac{3}{2}}}$$
/ 2 \
| 3*(a - x) |
-|1 + ------------|
| 2|
\ 1 - (a - x) /
--------------------
3/2
/ 2\
\1 - (a - x) /
$$- \frac{\frac{3 \left(a - x\right)^{2}}{- \left(a - x\right)^{2} + 1} + 1}{\left(- \left(a - x\right)^{2} + 1\right)^{\frac{3}{2}}}$$